Valve grinder



Nov; 3, 1925- G. w. FLEMING VALVE GRINDER Filed June'23, 1922 3 Sheets-Sheet 1 NkNN Jammy;

63902 9? M W. M.

A TTORNEY.

3 Sheets-Sheet 2 v l r l l l l l l l ui G. w. FLEMING VALVE GRINDER Filed June 1922 llll lll lllllll lllllrlllll lGlllllllull Nov. 3, 1925- 1 INVENTOK. Georye Mlleminy;

I ATTORNEY.

Nov. 3, 1925. UNITED stares GEORGE W. FLEMING, OF

SPRINGFIELD,MASSACHUSETTS, ASSIG'NOR TO FLEMING MACHINE COMPANY, OF SPRINGFIELD, -IMAQSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

VALVE GRINDER.

Application filed June 23, 1922. Serial No. 570,460.

To all whom it may concern."

Be it known that I, GEORGE W. FLEMING,

a citizen of the United States of America, residing at Springfield, county of Hampden, and State of Massachusetts, have invented certain new and useful Improvements in Valve Grinders, of which the following is a specification.

This invention relates to lll'lPlOVQl'llBlltS in machines for grinding valvesand reamers.

An object of the invention'isto provide a machine for grinding the bevel or inclined face of inlet and exhaust valves of internal combustion engines, and also for grinding the reamers which are formed with a bev eled cutting surface that are used for resurfacing the valve seat.

It further comprises means for moving the valve or reamer towards and away from the grinding wheel.

Further objects and nature of the invention will appear in the body of the specification and will be particularly pointed out in the claim appended thereto.

Referring to the drawings:

Fig. 1 is a front elevational view showing the two motors for rotating the grinding wheel and valve respectively with means for independently moving the same with relation to each other.

Fig. 2 is a plan view of Fig. 1 showing the operating handle for moving the motor, and a valve being ground.

Fig. 3 is a vertical sectional view on the line 83 of Fig. 2 showing the movable table which supports the motor for operating the grinding wheel and the screw for moving this table to bring the face of the wheel against the valve being ground, and

Fig. 4 is a transverse sectional view on the line 44 of Fig. 2 showing the laterally movable member which supports the motor that carries and rotates the valve or reamer being ground.

Referring to the drawings in detail:

1 designates the base part of the machine, 2 a movable table thereon which is formed with the depending lugs 3 on the underside thereof which receive the two table supporting rods 4. 5 designates a lug on the underside of the table which is formed with a threaded opening to receive the threaded table adjusting screw 6 on the outer end of which is secured the hand wheel 7 and handle .8 as shown. 9 is a pin for securing the hand wheel to the screw 6, and 10 is a collar on the screw which engages the inner wall of the base 1. 11 designates the slight elevations or bosses which receive the feet of the electric motor 12 for driving the grinding wheel 13. By rotating the screw 6 it will be seen that the table 2, motor 12 and grinding wheel .13 may be moved towards or from the operator, or in other words forward or rearward as desired.

14 designates a member that is transversely located in the base 1. It is provided with a spline 15 for retaining it in position for preventing its rotating about its axis. 16 is a handle for moving the member 14 towards the right or left hand. This handle is pivotally connected to the base piece 1 by means of the pin 17; its outer end is slotted to receive the pin 18 on the member 14 whereby when the handle 16 is operated the member 14 may be re ciprocated. Mounted on the opposite end of the member 14 is the base piece 19 to which is attached the platform or support 20 for the electric motor 21 by means of the machine screw 22. The shaft 23 of the motor 21 is geared to the shaft 24 which rotates the chuck 25 that receives the shank 26 of the valve 27 which is to be ground. It will therefore be seen that when the operator moves the handle 16 the motor 21 and the rotating valve 27 may be moved along the face of the rotating grinding wheel 13. Also, the wheel 13 may be moved towards and away from the face 28 of the valve 27 by means of the hand wheel 7. The positions of both motors are therefore indep endently adjustable.

The gears 29 and 30 serve to reduce the speed of the shaft 24 in order that the valve 27 may be rotated at a comparatively slow speed to impart a nice finished surface to the face 28 of the valve.

An important feature of my improvement is that the member 14 and motor 21 is directly operated from the handle 16.

It is of course obvious that the valve 27 may be replaced by a reamer for grinding the valve seat as the angle of the face of the reamer would correspond to the angle of the face of the valve, or in other words they would accurately match.

It should he stated that the spline 15 has a driving fit in the member 14, and a Slidpositions.

ing fit in the bosses 1 and 2 of the base piece 1. For the purpose of taking up any Wear and for the purpose of adjust- :ment, plug 31'of bronze or other suitable :material, is :placed .in an opening of the boss 1. 33 is a rod having its inner end 33 engaging the plug 31; its outer end 33? is threaded to fit the threaded opening-B3? in the base 1. 35 is a set nut for locking the rod 33 and the plug 31 in their adjusted By simply loosening the nut the rod 33 and plug 31 may be readjusted in order to maintain a 'tight fit between the spline 15 and the plug 81, whereby accurate grinding may be accomplished. By means of this construction it is not necessary to have an accurate and close fit between the spline 15 and the openings 15 in the bosses 1 and 2 since the plug 31 may be adjusted to take up any Wear as it takes place.

hat I claim is:

In a machine for grinding the inlet and exhaust valves of an internal combustion engine, the combination With a base piece, a platform movably mounted on the base piece, a motor and a grinding Wheel mounted on the movable platform, said motor serving to operate the grinding Wheel, means comprising two rods supported in the base, the platform having depending perforated lugs mounted on the rods, a depending threaded lug, a threaded shaft lo cated in said threaded lug for moving the platform With the motor and grinding Wheel as '-a unit, motor supporting and Work holding member reciprocably located in the base-piece below the supporting rods of the movable platform, means including a handle attached-t0 the member and base piece for reciprocating the member in a direction transversely of the direction of movement of the movable platform, a motor mounted on the reciprocable member, a rotatable clutch for receiving the valve stem of a valve, the bevel face of which valve is to be ground; the valve and its stem being rotated by the motor which is mounted on the reoiprocable member, the construction being such that the rotatable valve is moved across the face of the grinding Wheel.

GEORGE WV. FLEMING. 

